BIO 141 EXAM 1 CLICKER QUESTIONS & ANSWERS

BIO 141 EXAM 1 CLICKER
QUESTIONS & ANSWERS



A - Correct Answers -What is the best definition of homeostasis?
A. The body maintaining a constant environment
B. The body becoming the same temperature as the environment
C. The body not responding to changes

B - Correct Answers -Injured tissue releases chemicals which activate platelets in the
blood. Activated platelet release chemicals to attract MORE platelets, eventually
forming a blood clot. Which of the following is this an example?
A. Negative feedback
B. Positive feedback
C. Neither

C - Correct Answers -What is the atomic number of carbon?
A. 7
B. 8
C. 6
D. 4

B - Correct Answers -Which of the following classes of neurons are responsible for
detecting sensory information?
A. Interneuron
B. Afferent neuron
C. Efferent neuron
D. Motor neuron

C - Correct Answers -In thinking about a negative feedback loop, which class of
neurons will form a synapse with a target tissue? The action of this class of neurons will
cause a response in the target tissue to bring the body back to a setpoint.
A. Interneuron
B. Afferent neuron
C. Efferent neuron
D. Sensory neuron

B - Correct Answers -Motor neurons will always initiate a local potential via ______.
A. Mechanical-gated channels
B. Chemical-gated channels

, C. Temperature-gated channels


A - Correct Answers -What would the charge be on a calcium ion
A. +2
B. -2
C. +1
D. -1

C - Correct Answers -A sodium atom has an atomic number of 11. How many electrons
are present if the atom is NOT an ion?
A. Ten
B. Seven
C. Eleven
D. Eight

B - Correct Answers -Which of the following is likely a larger molecule?
A. monomer
B. polymer

C - Correct Answers -Which of the following organelles primarily consists of proteins?
A. plasma membrane
B. endoplasmic reticulum
C. ribosome
D. golgi body

C - Correct Answers -Which of the following events may occur in a cell with non-
functioning Golgi bodies?
A. More vesicles would be produced
B. RNA would not be able to leave the nucleus
C. There would be fewer proteins transported out of the cell
D. There would be fewer proteins in the endoplasmic reticulum

A - Correct Answers -Can a sodium ion (Na+) diffuse across a membrane?
A. No
B. Yes

B - Correct Answers -Can a water molecule diffuse across a membrane?
A. Not at all
B. Yes, but slowly
C. Yes, no problem

B - Correct Answers -Can a steroid hormone (like estrogen) diffuse across the
membrane? Hint - steroid hormones are classified as lipids?
A. No
B. Yes